Instruction group formation techniques for decode-time instruction optimization based on feedback
First Claim
1. A method of processing instructions for execution by a processor, comprising:
- determining, using grouping logic, whether a first property of a first instruction and a second property of a second instruction in an instruction stream are compatible, wherein the first instruction is a last instruction before a cache boundary and the second instruction is an initial instruction after the cache boundary;
grouping, using the grouping logic, the first instruction and the second instruction in a same decode-time instruction optimization group in response to the first and second properties being compatible and a feedback value generated by a feedback function indicating the same decode-time instruction optimization group has been historically beneficial with respect to a benefit metric of the processor; and
group, using the grouping logic, the first and second instructions in different decode-time instruction optimization groups, in response to the first and second properties being compatible and the feedback value indicating the grouping of the first and second instructions in the same decode-time instruction optimization group has not been historically beneficial.
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Abstract
A technique of processing instructions for execution by a processor includes determining whether a first property of a first instruction and a second property of a second instruction are compatible. The first instruction and the second instruction are grouped in an instruction group in response to the first and second properties being compatible and a feedback value generated by a feedback function indicating the instruction group has been historically beneficial with respect to a benefit metric of the processor. Group formation for the first and second instructions is performed according to another criteria, in response to the first and second properties being incompatible or the feedback value indicating the grouping of the first and second instructions has not been historically beneficial.
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Citations
12 Claims
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1. A method of processing instructions for execution by a processor, comprising:
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determining, using grouping logic, whether a first property of a first instruction and a second property of a second instruction in an instruction stream are compatible, wherein the first instruction is a last instruction before a cache boundary and the second instruction is an initial instruction after the cache boundary; grouping, using the grouping logic, the first instruction and the second instruction in a same decode-time instruction optimization group in response to the first and second properties being compatible and a feedback value generated by a feedback function indicating the same decode-time instruction optimization group has been historically beneficial with respect to a benefit metric of the processor; and group, using the grouping logic, the first and second instructions in different decode-time instruction optimization groups, in response to the first and second properties being compatible and the feedback value indicating the grouping of the first and second instructions in the same decode-time instruction optimization group has not been historically beneficial. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification